test_pandas.py 文件源码

def test_date_unit(self):
        df = self.tsframe.copy()
        df['date'] = Timestamp('20130101 20:43:42')
        df.ix[1, 'date'] = Timestamp('19710101 20:43:42')
        df.ix[2, 'date'] = Timestamp('21460101 20:43:42')
        df.ix[4, 'date'] = pd.NaT

        for unit in ('s', 'ms', 'us', 'ns'):
            json = df.to_json(date_format='epoch', date_unit=unit)

            # force date unit
            result = read_json(json, date_unit=unit)
            assert_frame_equal(result, df)

            # detect date unit
            result = read_json(json, date_unit=None)
            assert_frame_equal(result, df)